Immergas V2 Instructions And Warnings page 36

2.4 WIRING DIAGRAM FOR USING THE KIT ON A SYSTEM SPLIT INTO 1 DIRECT ZONE AND 2 MIXED ZONES
1
Key:
B4 - External probe (optional)
B3-2 - Zone 2 low temperature flow probe
B3-3 - Zone 3 low temperature flow probe
E7-2 - Zone 2 low temperature safety
thermostat
E7-3 - Zone 3 Low temperature safety
thermostat
M10-1 - Zone 1 circulator
M10-2 - Zone 2 circulator
M10-3 - Zone 3 circulator
M31-2 - Zone 2 mixing valve
M31-3 - Zone 3 mixing valve
R12 - Zone 2 low temperature flow
regulation trimmer
R13 - Zone 3 low temperature flow
regulation trimmer
36
9
5
6
S25 - P.C.B. setting selector
S26 - P.C.B. setting selector
S27 - P.C.B. setting selector
S28 - P.C.B. setting selector
T2 - Zones control unit low voltage feeder
1 - 230 Vac 50 Hz power supply
2 - Central heating request outlet to boiler
or other zones control unit
3 - Central heating request inlet from
other zones control unit
4 - Zones signal state outlet for other
zones control unit
5 - Connection to marker safety
thermostat
6 - Connections to ON/OFF room
thermostats
2
3
8
7
Zone
Zone 1
Zone 2
Zone 3
7 - Zones signal state inlet from boiler or
other zones control unit
8 - DIM BUS connection to boiler
9 - Zones control unit
BK - Black
BR - Brown
BL - Blue
GY - Grey
R - Red
OR - Orange
Y/G - Yellow/Green
4
Type
Direct
Mixed
Mixed
9